Add static-passwd and static-group files

In order to pass reproducible tests, recipes that use the
useradd class must have static ids configured.

Signed-off-by: Fabien Thomas <fabien.thomas@smile.fr>
Reviewed-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-multimedia/files/static-group-meta-multimedia

@@ -0,0 +1,2 @@
+pipewire:x:660:
+mpd:x:665:

meta-multimedia/files/static-passwd-meta-multimedia

@@ -0,0 +1,2 @@
+pipewire:x:660:660::/:/bin/nologin
+mpd:x:665:665::/:/bin/nologin